Question

for what value of k, we have 7x sq - 5x + k = -4, given that x = -2​

Answer 1

Answer:

7x^2-5x+k=-4

given, x=-2

A.T.Q

7(-2)^2-5(-2)+k=-4

7(4)+10+k=-4

28+10+k=-4

38+k=-4

k=-4-38=-42